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Rittmannite

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Formula:
{(Mn
2+
 
,Ca)}{Mn
2+
 
}{(Fe
2+
 
,Mn
2+
 
,Mg)
 
2
}{(Al,Fe
3+
 
)
 
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
System:MonoclinicColour:Light yellow
Hardness:
Member of:Whiteite Group
Name:
Named after the Swiss volcanologist Alfred Rittmann (1893 - 1980). Considered by many as the founder of European volcanology, Rittmann was primarily active in Italy.

Classification of Rittmannite

IMA status:Approved 1987
Strunz 8th edition ID:7/D.29-40
Strunz 9th edition ID:8.DH.15
Nickel-Strunz 10th (pending) edition ID:8.DH.15

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
H : With large and medium-sized cations, (OH, etc.):RO4 < 1:1
Dana 8th edition ID:42.11.3.4

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
11 : (AB)3(XO4)2Zq·xH2O
Hey's CIM Ref.:19.12.63

19 : Phosphates
12 : Phosphates of Mn
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Type Occurrence of Rittmannite

Type Locality:Cubos-Mesquitela-Mangualde area, Mangualde, Viseu District, Portugal

Physical Properties of Rittmannite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent
Colour:Light yellow
Hardness (Mohs):

Crystallography of Rittmannite

Crystal System:Monoclinic
Cell Parameters:a = 15.01Å, b = 6.89Å, c = 10.16Å
β = 112.82°
Ratio:a:b:c = 2.179 : 1 : 1.475
Unit Cell Volume:V 968.49 ų (Calculated from Unit Cell)

Optical Data of Rittmannite

Type:Biaxial (+)
RI values: nα = 1.622 nβ = 1.628 nγ = 1.654
2V:Measured: 43° , Calculated: 52°
Maximum Birefringence:δ = 0.032

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:r > v to r < v strong

Chemical Properties of Rittmannite

Formula:
{(Mn
2+
 
,Ca)}{Mn
2+
 
}{(Fe
2+
 
,Mn
2+
 
,Mg)
 
2
}{(Al,Fe
3+
 
)
 
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
Simplified for copy/paste:{(Mn2+,Ca)}{Mn2+}{(Fe2+,Mn2+,Mg)2}{(Al,Fe3+)2}(PO4)4(OH)2·8H2O
Essential elements:Al, Fe, H, Mn, O, P
All elements listed in formula:Al, Ca, Fe, H, Mg, Mn, O, P
Common Impurities:Mg

Relationship of Rittmannite to other Species

Member of:Whiteite Group
Other Members of Group:

- +
Whiteite-(CaFeMg)
{Ca}{(Fe
2+
 
,Mn
2+
 
)}{Mg
 
2
}{Al
 
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
Whiteite-(CaMnMg)
{Ca}{Mn
2+
 
}{Mg
 
2
}{Al
 
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
Whiteite-(CaMnMn)
Whiteite-(MnFeMg)
{(Mn
2+
 
,Ca)}{(Fe
2+
 
,Mn
2+
 
)}{Mg
 
2
}{Al
 
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
Whiteite-(MnMnMg)
MnMnMg
 
2
Al
 
2
(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
Related Minerals - Nickel-Strunz Grouping):

- +
8.DH.05Minyulite
KAl
 
2
(PO
 
4
)
 
2
(OH,F) · 4H
 
2
O
8.DH.10Leucophosphite
KFe
3+
2
(PO
 
4
)
 
2
(OH) · 2H
 
2
O
8.DH.10Spheniscidite
(NH
 
4
,K)(Fe
3+
 
,Al)
 
2
(PO
 
4
)
 
2
(OH) · 2H
 
2
O
8.DH.10Tinsleyite
KAl
 
2
(PO
 
4
)
 
2
(OH) · 2H
 
2
O
8.DH.15Jahnsite-(CaMnFe)
{Ca}{Mn
2+
 
}{Fe
2+
2
}{Fe
3+
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
8.DH.15Jahnsite-(CaMnMg)
{Ca}{Mn
2+
 
}{(Mg,Fe
2+
 
)
 
2
}{Fe
3+
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
8.DH.15Jahnsite-(CaMnMn)
{Ca}{Mn
2+
 
}{Mn
2+
2
}{Fe
3+
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
8.DH.15Keckite
CaMn
2+
 
Fe
3+
2
Fe
3+
2
(PO
 
4
)
 
4
(OH)
 
3
(H
 
2
O)
 
7
8.DH.15Whiteite-(CaFeMg)
{Ca}{(Fe
2+
 
,Mn
2+
 
)}{Mg
 
2
}{Al
 
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
8.DH.15Whiteite-(CaMnMg)
{Ca}{Mn
2+
 
}{Mg
 
2
}{Al
 
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
8.DH.15Whiteite-(MnFeMg)
{(Mn
2+
 
,Ca)}{(Fe
2+
 
,Mn
2+
 
)}{Mg
 
2
}{Al
 
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
8.DH.15Jahnsite-(MnMnMn)
{Mn
2+
 
}{Mn
2+
 
}{Mn
2+
2
}{Fe
3+
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
8.DH.15Kaluginite
(Mn
2+
 
,Ca)MgFe
3+
 
(PO
 
4
)
 
2
(OH) · 4H
 
2
O
8.DH.15Jahnsite-(CaFeFe)
{Ca}{Fe
2+
 
}{Fe
2+
2
}{Fe
3+
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
8.DH.15Jahnsite-(NaFeMg)
NaFe
3+
 
Mg
 
2
Fe
3+
2
(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
8.DH.15Jahnsite-(NaMnMg)
{Na}{Mn
3+
 
}{Mg
 
2
}{Fe
3+
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
8.DH.15Jahnsite-(CaMgMg)
{Ca}{Mg}{Mg
 
2
}{Fe
3+
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
8.DH.20Manganosegelerite
(Mn
2+
 
,Ca)(Mn
2+
 
,Fe
2+
 
,Mg)Fe
3+
 
(PO
 
4
)
 
2
(OH) · 4H
 
2
O
8.DH.20Overite
CaMgAl(PO
 
4
)
 
2
(OH) · 4H
 
2
O
8.DH.20Segelerite
Ca
 
2
Mg
 
2
Fe
3+
2
(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
8.DH.20Wilhelmvierlingite
CaMnFe
3+
 
(PO
 
4
)
 
2
(OH) · 2H
 
2
O
8.DH.20Juonniite
CaMgSc(PO
 
4
)
 
2
(OH) · 4H
 
2
O
8.DH.25Calcioferrite
Ca
 
2
Fe
3+
2
(PO
 
4
)
 
3
(OH) · 7H
 
2
O
8.DH.25Kingsmountite
Ca
 
4
(Fe
2+
 
,Mn
2+
 
)Al
 
4
(PO
 
4
)
 
6
(OH)
 
4
· 12H
 
2
O
8.DH.25Montgomeryite
Ca
 
4
MgAl
 
4
(PO
 
4
)
 
6
(OH)
 
4
· 12H
 
2
O
8.DH.25Zodacite
Ca
 
4
Mn
2+
 
Fe
3+
4
(PO
 
4
)
 
6
(OH)
 
4
· 12H
 
2
O
8.DH.30Arseniosiderite
Ca
 
2
Fe
3+
3
(AsO
 
4
)
 
3
O
 
2
· 3H
 
2
O
8.DH.30Kolfanite
Ca
 
2
Fe
3+
2
(AsO
 
4
)
 
3
O
 
2
· 2H
 
2
O
8.DH.30Mitridatite
Ca
 
2
Fe
3+
3
(PO
 
4
)
 
3
O
 
2
· 3H
 
2
O
8.DH.30Pararobertsite
Ca
 
2
Mn
3+
3
(PO
 
4
)
 
3
O
 
2
· 3H
 
2
O
8.DH.30Robertsite
Ca
 
3
Mn
3+
4
(PO
 
4
)
 
3
O
 
2
· 3H
 
2
O
8.DH.30Sailaufite
(Ca,Na,☐)
 
2
Mn
3+
3
(AsO
 
4
)
 
2
(CO
 
3
)O
 
2
· 3H
 
2
O
8.DH.35Mantienneite
KMg
 
2
Al
 
2
Ti(PO
 
4
)
 
4
(OH)
 
3
· 15H
 
2
O
8.DH.35Paulkerrite
K(Mg,Mn
2+
 
)
 
2
(Fe
3+
 
,Al,Ti,Mg)
 
2
Ti(PO
 
4
)
 
4
(OH)
 
3
· 15H
 
2
O
8.DH.35Benyacarite
(H
 
2
O,K)
 
2
(Mn
2+
 
,Fe
2+
 
)
 
2
(Fe
3+
 
,Ti)
 
2
Ti(PO
 
4
)
 
4
(O,F)
 
2
· 14H
 
2
O
8.DH.40Xanthoxenite
Ca
 
4
Fe
3+
2
(PO
 
4
)
 
4
(OH)
 
2
· 3H
 
2
O
8.DH.45Mahnertite
NaCu
 
3
(AsO
 
4
)
 
2
Cl · 5H
 
2
O
8.DH.50Andyrobertsite
KCdCu
 
5
(AsO
 
4
)
 
4
(H
 
2
AsO
 
4
) · 2H
 
2
O
8.DH.50Calcioandyrobertsite
KCaCu
 
5
(AsO
 
4
)
 
4
(H
 
2
AsO
 
4
) · 2H
 
2
O
8.DH.55Englishite
K
 
3
Na
 
2
Ca
 
10
Al
 
15
(PO
 
4
)
 
21
(OH)
 
7
· 26H
 
2
O
8.DH.60Bouazzerite
Bi
 
6
(Mg,Co)
 
11
Fe
3+
14
(AsO
 
4
)
 
18
(OH)
 
4
O
 
12
· 86H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
19.12.1Metaswitzerite
Mn
 
3
(PO
 
4
)
 
2
· 4H
 
2
O
19.12.2Bermanite
Mn
2+
 
Mn
3+
2
(PO
 
4
)
 
2
(OH)
 
2
· 4H
 
2
O
19.12.3Natrophilite
NaMn
2+
 
PO
 
4
19.12.4Sidorenkite
Na
 
3
Mn
2+
 
(CO
 
3
)(PO
 
4
)
19.12.5Niahite
(NH
 
4
)(Mn
2+
 
,Mg)(PO
 
4
) · H
 
2
O
19.12.6Robertsite
Ca
 
3
Mn
3+
4
(PO
 
4
)
 
3
O
 
2
· 3H
 
2
O
19.12.7Pararobertsite
Ca
 
2
Mn
3+
3
(PO
 
4
)
 
3
O
 
2
· 3H
 
2
O
19.12.8Sinkankasite
H
 
2
Mn
2+
 
Al(PO
 
4
)
 
2
(OH) · 6H
 
2
O
19.12.9Mangangordonite
Mn
2+
 
Al
 
2
(PO
 
4
)
 
2
(OH)
 
2
· 8H
 
2
O
19.12.10Heterosite
(Fe
3+
 
,Mn
3+
 
)PO
 
4
19.12.11Purpurite
(Mn
3+
 
,Fe
3+
 
)PO
 
4
19.12.12Wolfeite
(Fe
2+
 
,Mn
2+
 
)
 
2
(PO
 
4
)(OH)
19.12.13Triploidite
(Mn
2+
 
,Fe
2+
 
)
 
2
(PO
 
4
)(OH)
19.12.14Lipscombite
(Fe
2+
 
,Mn
2+
 
)Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
19.12.15Frondelite
Mn
2+
 
Fe
3+
4
(PO
 
4
)
 
3
(OH)
 
5
19.12.16Rockbridgeite
Fe
2+
 
Fe
3+
4
(PO
 
4
)
 
3
(OH)
 
5
19.12.17Kryzhanovskite
(Fe
3+
 
,Mn
2+
 
)
 
2
(PO
 
4
)
 
2
(OH,H
 
2
O)
 
3
19.12.18Landesite
Mn
2+
3-x
Fe
3+
x
(PO
 
4
)
 
2
(OH)
 
x
· (3-x)H
 
2
O
19.12.19Phosphoferrite
(Fe
2+
 
,Mn
2+
 
)
 
3
(PO
 
4
)
 
2
· 3H
 
2
O
19.12.20Reddingite
(Mn
2+
 
,Fe
2+
 
)
 
3
(PO
 
4
)
 
2
· 3H
 
2
O
19.12.21Earlshannonite
Mn
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
· 4H
 
2
O
19.12.22Hureaulite
(Mn,Fe)
 
5
(PO
 
4
)
 
2
(HPO
 
4
)
 
2
· 4H
 
2
O
19.12.23Switzerite
(Mn,Fe)
 
3
(PO
 
4
)
 
2
· 7H
 
2
O
19.12.24Laueite
Mn
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
· 8H
 
2
O
19.12.25Pseudolaueite
Mn
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
· 8H
 
2
O
19.12.26Strunzite
Mn
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
· 6H
 
2
O
19.12.27Stewartite
Mn
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
· 8H
 
2
O
19.12.28Alluaudite
(Na,Ca)Mn
2+
 
(Fe
3+
 
,Mn
2+
 
,Fe
2+
 
,Mg)
 
2
(PO
 
4
)
 
3
19.12.29Ferroalluaudite
(Na,Ca)Fe
2+
 
(Fe
3+
 
,Mn
2+
 
,Fe
2+
 
)
 
2
(PO
 
4
)
 
3
19.12.30Fillowite
{Mn
2+
 
}{Na
 
8
}{Ca
 
4
Na
 
4
}{(Mn
2+
 
,Fe
2+
 
)
 
43
}(PO
 
4
)
 
36
19.12.31Johnsomervilleite
Na
 
10
Ca
 
6
Mg
 
18
Fe
 
25
(PO
 
4
)
 
36
19.12.32Wicksite
NaCa
 
2
(Fe
2+
 
,Mn
2+
 
)
 
4
MgFe
3+
 
(PO
 
4
)
 
6
· 2H
 
2
O
19.12.33Dickinsonite-(KMnNa)
{KNa}{Mn
2+
 
◻}{Ca}{Na
 
3
}{Mn
2+
13
}{Al}(PO
 
4
)
 
12
(OH)
 
2
19.12.34Sarcopside
(Fe
2+
 
,Mn
2+
 
,Mg)
 
3
(PO
 
4
)
 
2
19.12.35Ludlamite
(Fe,Mn,Mg)
 
3
(PO
 
4
)
 
2
· 4H
 
2
O
19.12.36Graftonite
(Fe
2+
 
,Mn
2+
 
,Ca)
 
3
(PO
 
4
)
 
2
19.12.37Wilhelmvierlingite
CaMnFe
3+
 
(PO
 
4
)
 
2
(OH) · 2H
 
2
O
19.12.38Fairfieldite
Ca
 
2
(Mn
2+
 
,Fe
2+
 
)(PO
 
4
)
 
2
· 2H
 
2
O
19.12.39Beusite
(Mn
2+
 
,Fe
2+
 
,Ca,Mg)
 
3
(PO
 
4
)
 
2
19.12.40Messelite
Ca
 
2
(Fe
2+
 
,Mn
2+
 
)(PO
 
4
)
 
2
· 2H
 
2
O
19.12.41Jahnsite-(CaMnFe)
{Ca}{Mn
2+
 
}{Fe
2+
2
}{Fe
3+
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
19.12.42Jahnsite-(CaMnMn)
{Ca}{Mn
2+
 
}{Mn
2+
2
}{Fe
3+
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
19.12.43Jahnsite-(CaMnMg)
{Ca}{Mn
2+
 
}{(Mg,Fe
2+
 
)
 
2
}{Fe
3+
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
19.12.44Keckite
CaMn
2+
 
Fe
3+
2
Fe
3+
2
(PO
 
4
)
 
4
(OH)
 
3
(H
 
2
O)
 
7
19.12.45Stanfieldite
Ca
 
7
Ca
 
2
Mg
 
9
(PO
 
4
)
 
12
19.12.46Laubmannite
(Fe
2+
 
,Mn
2+
 
,Ca)
 
3
Fe
3+
6
(PO
 
4
)
 
4
(OH)
 
12
19.12.47Zodacite
Ca
 
4
Mn
2+
 
Fe
3+
4
(PO
 
4
)
 
6
(OH)
 
4
· 12H
 
2
O
19.12.48Hagendorfite
NaCaMn
2+
 
Fe
2+
2
(PO
 
4
)
 
3
19.12.49Maghagendorfite
(□,Na,)(Na,Ca,Fe
2+
 
)Mn(Mg,Fe
2+
 
,Fe
3+
 
)
 
3
(PO
 
4
)
 
3
19.12.50Varulite
NaCaMn
2+
 
Mn
2+
2
(PO
 
4
)
 
3
19.12.51Griphite
Na
 
4
Li
 
2
Ca
 
6
(Mn
2+
 
,Fe
2+
 
,Mg)
 
19
Al
 
8
(PO
 
4
)
 
24
(F,OH)
 
8
19.12.52Attakolite
(Ca,Sr)Mn(Al,Fe)
 
4
(HPO
 
4
,PO
 
4
)
 
3
(SiO
 
4
,PO
 
4
)(OH)
 
4
19.12.53Arrojadite-(KFe)
{KNa}{Fe
2+
 
◻}{Ca}{Na
 
2
◻}{Fe
2+
13
}{Al}(PO
 
4
)
 
11
(HPO
 
4
)(OH)
 
2
19.12.54Lun'okite
(Mn,Ca)(Mg,Fe,Mn)Al(PO
 
4
)
 
2
OH · 4H
 
2
O
19.12.55Eosphorite
(Mn
2+
 
,Fe
2+
 
)Al(PO
 
4
)(OH)
 
2
· H
 
2
O
19.12.56Ernstite
(Mn
2+
 
,Fe
3+
 
)Al(PO
 
4
)(OH,O)
 
2
· H
 
2
O
19.12.57Childrenite
(Fe
2+
 
,Mn
2+
 
)Al(PO
 
4
)(OH)
 
2
· H
 
2
O
19.12.58Bobfergusonite
Na
 
2
Mn
 
5
FeAl(PO
 
4
)
 
6
19.12.59Qingheiite
NaMn
3+
 
Mg(Al,Fe
3+
 
)(PO
 
4
)
 
3
19.12.60Whiteite-(CaFeMg)
{Ca}{(Fe
2+
 
,Mn
2+
 
)}{Mg
 
2
}{Al
 
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
19.12.61Whiteite-(CaMnMg)
{Ca}{Mn
2+
 
}{Mg
 
2
}{Al
 
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
19.12.62Whiteite-(MnFeMg)
{(Mn
2+
 
,Ca)}{(Fe
2+
 
,Mn
2+
 
)}{Mg
 
2
}{Al
 
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
19.12.64Zanazziite
Ca
 
2
Mg
 
5
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
· 6H
 
2
O
19.12.65Samuelsonite
(Ca,Ba)Ca
 
8
Fe
2+
2
Mn
2+
2
Al
 
2
(PO
 
4
)
 
10
(OH)
 
2

Other Names for Rittmannite

Synonyms:
IMA1987-048
Other Languages:
German:Rittmannit
Spanish:Rittmannita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Rittmannite

Reference List:

- +
American Mineralogist (1990): 75: 932-933.

Internet Links for Rittmannite

Search Engines:
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  • Look for Rittmannite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Rittmannite details from Handbook of Mineralogy (PDF)
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  • Localities for Rittmannite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Germany
     
    • Bavaria
      • Lower Bavaria
        • Bavarian Forest
          • Zwiesel
            • Rabenstein
    Hochleitner, R. (2000): Rittmannit – Erstnachweis des Minerals der Jahnsit-Whiteit-Gruppe aus dem Pegmatit vom Hühnerkobel im Bayerischen Wald. Münchner Geologische Hefte, A 28, 29-33. [http://www.lrz.de/~Mineralogische.Staatssammlung/ritt.pdf]
      • Upper Palatinate
        • Oberpfälzer Wald
          • Vohenstrauß
            • Waidhaus
              • Hagendorf
    Stephan Wolfsried
    in the collection of J. Esche
    Morocco
     
    • Marrakech-Tensift-El Haouz Region
      • El Kelaâ des Sraghna Province
        • Sidi Bou Othmane
    Favreau, G. (2012): Deux pegmatites à phosphates de Sidi Bou Othmane (Maroc). Le Cahier des Micromonteurs, 3-2012, 71-109
    Portugal
     
    • Guarda District
      • Sabugal
        • Bendada
    Sopas de Pedra, A. M. Galopim de Carvalho, Gradiva, Lisbon, Portugal
    - Rewitzer, C. and Röschl, N. (1984) Portugal - locality descriptions and travel recommendations. Lapis, 9 (12), 13-17. (in German)
    • Viseu District
      • Mangualde
    M. F. di Cossato & P. Orlandi : Can. Min. 27:447-449
    Mineralien Atlas
    USA
     
    • North Carolina
      • Cleveland Co.
        • Kings Mountain District
    XRD/EDS 2006 Jason B. Smith
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